A hollow-core drilling tool or machine used to cut large circular holes in stone, leaving a removable cylindrical core.
Carotatrice is a core-drilling tool or machine whose cutter is shaped like a hollow tube. The cutting rim may be toothed, abrasive, or used with water and sand. As the circular cut deepens, a cylindrical core remains at the center and can be broken away and removed.
Le voci del marmo notes its use both in modern extraction and historically for hollowing the interiors of stone vessels.
Etymology
From Italian carota, “core” in technical drilling usage.
Sculptor Notes
Core drilling removes only the circumference of the hole rather than pulverizing the entire volume. This makes it efficient for large-diameter openings and for removing deep cylindrical waste.
References
https://levocidelmarmo.sns.it/scheda_oggetti_relazione.php?denom=carotatrice&id=25